Bleeding from the Rectum in Young Adults Linked to 8.5 Times Higher Risk of Colorectal Cancer

Healthcare professional speaking with young patient
New study shows that rectal bleeding can be a warning sign for colorectal cancer in individuals under 50. Stock Photo
  • Researchers say that rectal bleeding is a strong indication of early onset colorectal cancer in adults under 50.
  • Experts advise that younger adults who notice this sign should have a colon examination to screen for colorectal cancer.
  • Incidence of early onset colorectal cancer in young adults have been rising for over a decade.

Bleeding from the rectum is a clear indicator that young adults may have colorectal cancer, according to a recent research.

Researchers found that rectal bleeding in individuals under 50 increases the likelihood of a colorectal cancer diagnosis by 8.5 times.

The researchers reached their conclusions after analyzing 443 individuals below 50 who underwent a colonoscopy at a university health system between 2021 and 2023.

Among the participants, 195 were diagnosed with young-onset colorectal cancer while the remaining individuals had clear colonoscopy results.

The scientists noted that the vast majority of the young cancer patients underwent a colonoscopy because of signs, not because of routine screenings.

They added that 70% of the cancer patients had no family history of the condition.

Furthermore, people who had smoked in the past were over two times as likely to develop early onset colorectal cancer as people who hadn’t smoked.

The researchers’ study was shared this week at a professional gathering. The findings have yet to be released in a scientific publication.

Rectal Bleeding Could Signal Bowel Cancer

The researchers stated that their study demonstrates that individuals under 50 as well as healthcare providers should take rectal bleeding as a significant indicator of colorectal cancer.

“Many of the early-onset colorectal cancers that I see have no family history,” commented a colorectal surgeon and lead researcher of the study. “This research adds weight to the issue of who should or shouldn’t require a colonoscopy: if you have a individual under the screening age with rectal bleeding, you should seriously consider a colonoscopy.”

Specialists interviewed who were not involved in the research agreed with this assessment.

“Younger individuals with rectal bleeding should get a colonoscopy,” said a cancer specialist. “The most difficult point to get across is that colorectal cancer is a disease of younger individuals.”

Another surgical oncologist said that medical professionals should not presume that rectal bleeding in younger adults is caused by hemorrhoids.

“Colorectal cancer is a younger individual’s condition,” he said. “We can not dismiss signs such as rectal bleeding in young adults.”

A senior vice president of early cancer detection science at a major cancer organization concurs.

“Doctors often minimize symptoms of colorectal cancer in younger adults, thinking that the chances of the symptoms being caused by colorectal cancer are remote because the patient is under 50,” the expert noted. “The study results are not surprising. Ongoing rectal bleeding is abnormal and the cause should be promptly investigated.”

A medical oncologist said that the research is an important reminder to people under the age of 50.

“Don’t ignore any signs,” he said. “This study delivers this message a little louder.”

Colorectal Cancer Cases Rising in Younger Individuals

A major cancer organization projects there will be over one hundred fifty thousand new cases of colorectal cancer identified in the United States this year.

Over one hundred thousand of those instances will be colon cancer, while slightly less than fifty thousand will be rectal cancer.

The cases are divided almost evenly between males and women.

Colorectal cancer is the third most common cause of cancer-related deaths in males and the fourth leading cause in women in the United States. It’s the second most frequent most common cause of cancer deaths overall. Colorectal cancer is projected to cause about fifty-three thousand deaths this year.

The institute reports that the rate of people being diagnosed with colorectal cancer in the United States has been declining approximately one percent per year since the 1980s. They attribute early screening and changes in lifestyle habits.

Nevertheless, they point out that the downward trend is primarily occurring in individuals over 50. In people under 50, the incidence of colorectal cancer diagnosis increased over two percent per year between 2012 and 2021.

The death rate from colorectal cancer has also been decreasing moderately in the general public, but it has been rising slightly in individuals under 50.

In fact, colon cancer is the primary reason of cancer-related death in adults ages 20 to 49 in the United States.

An specialist said that people born around 1990 have twice the risk of colorectal cancer relative to people born approximately 1950.

“These dangers are increasing and are persisting as people age, meaning we see an increasing number of diagnoses of colorectal cancer both below and above age 45,” he said.

Doctors are unsure what is driving the rise in young-onset colorectal cancer, but diet, sedentary lifestyle, and obesity are among the suspected factors.

Another expert mentioned there are additionally some ideas that the overuse of antibiotics as well as inflammation in the body may be contributing to drive up colorectal cancer rates.

Furthermore, there has also been some study indicating that intestinal bacteria may also be involved.

One expert suggested that exposure to this type of microbes as a child may cause colorectal cancer to develop twenty to thirty years later.

“We’re still trying to figure all this out,” he commented.

The Importance of Colorectal Cancer Tests Are Important

Healthcare professionals say that colorectal cancer is curable if caught in its initial phases. In advanced phases, it can be fatal.

They say that’s why examinations are vital.

Present guidelines call for males and females to start being tested for colorectal cancer at age 45.

Furthermore, screenings may be required before age 45 if a person has a family history of colorectal cancer or has specific health issues such as inflammatory bowel disease (IBD).

It’s advised that colonoscopy examinations be done every 10 years for people with no genetic risk of the condition and no growths discovered during the procedure. The time between tests can be more frequent for different patients.

Colon examinations are generally regarded as the most effective test for colorectal cancer, but other tests, such as home test kits, can also be used.

Besides rectal bleeding, additional signs of colorectal cancer consist of:

  • change in bowel habits
  • diarrhea
  • constipation
  • pain or stomach pain
  • unexpected weight loss

An expert notes that genetic background should not be overlooked.

“Individuals should know their genetic background of cancer and any identification of colorectal cancer among relatives should be discussed with their physician, especially if relatives were diagnosed at a young age,” he advised.

Ways to Reduce Your Chances of Bowel Cancer

There are a number of ways a individual can lower their risk of colorectal cancer. These include:

  • Healthy diet: Eating patterns high in fat and low in dietary fiber are associated with an increased risk of colorectal cancer. Red and processed meats have been demonstrated to increase the risk. Protein from chicken, seafood, and beans is considered a better choice. Fiber-rich items, including fruits, greens, and grains, may decrease the probability of colorectal cancer.
  • Physical activity: A major cancer research institute suggests two and a half hours of moderate exercise a week. {Regular|Consistent
Ronald Stein
Ronald Stein

Maya is a certified automotive specialist with over a decade of experience in clutch systems and vehicle diagnostics.